'Diaries' star teases Bonnie trouble

Katerina Graham has revealed that her Vampire Diaries character Bonnie will face problems in future episodes.

Speaking to E! Online, Graham hinted that Bonnie will be unable to cope with her new life as a witch.

"When you develop anything, there's a positive to it and a negative to it," she said. "You'll be able to see both sides of that."

Meanwhile, the show's executive producer Kevin Williamson explained that Bonnie will struggle to deal with her powers because her grandmother is no longer around to mentor her.

"She's coming into her own, and she's learning how to be a witch and how to be a strong witch, but we're also showing that there are some weaknesses involved and she's got to be careful," he said. "She doesn't really know. She doesn't have master Grams anymore to teach her anything. She's on her own. She's got that Grimwar, she can do stuff, but there's a price that she has to pay."